Loop Leader PD6622/4 Loop-Powered Rate/Totalizer Instruction Manual
38
Meter
Operation
The meter is capable of accepting a 4-20 mA current signal and displaying it in engineering units from -
99,999 to 999,999 on the top line or from -9,999,999 to 99,999,999 on the bottom line. For example, a 4-
20 mA signal could be displayed as -50.000 to 50.000.
The dual-line display can be customized by the user to operate in such a way as to satisfy a specific appli-
cation. Typically, the top line is used for the rate variable while the bottom line is used for total, grand total,
engineering units, or custom tag.
Front Panel Buttons Operation
Button Symbol
Description
Press to enter or exit
Programming Mode
, view set-
tings, or exit max/min readings
Press to display max/min readings or other parame-
ter/function assigned through the
User
menu
Press to reset max/min readings or other parame-
ter/function assigned through the
User
menu
Press to acknowledge alarms or other parame-
ters/function assigned through the
User
menu
Function Keys Operation
During operation, the programmable function keys operate according to the way they have been pro-
grammed in the
Advanced Features
– User
menu. The table above shows the factory default settings for
F1, F2, and F3.
A hint message may be enabled in order to provide a description of what each function key does prior to
executing their assigned function. See Enabling the Function Key Hint Feature (
Digital Input Operation
A digital input is standard on the meter. This digital input is programmed identically to function keys F1,
F2, and F3. The input is triggered with a contact closure between DI+ and DI-, or with an active low sig-
nal. During operation, the digital input operates according to the way it has been programmed in the
Ad-
vanced Features
– User
menu.
Maximum/Minimum Readings
The max & min readings (peak & valley) reached by the rate variable can be displayed either continu-
ously or momentary:
1. Display briefly by pressing the F1 key (default) or assigning to any of the other function keys or to
the digital input in the
User
menu.
2. Display continuously by pressing the
Enter
button while the max/min is being displayed to lock
the display. Press
Enter
again to unlock.
Any of the F1-F3 function keys (buttons) and the digital input can be programmed to reset the max & min
readings. The meters are set at the factory to display the max reading by pressing the
Right Arrow/F1
button and to use the
Up-Arrow/F2
button to access the
Reset
menu. Press the
Right Arrow
button to cy-
cle through the available parameters to reset.
Changing Engineering Units
It is possible to change the display units without the need to re-scale the meter. The
UNITS
menu within
the
DISPLAY
menu allows the unit of measure to be changed (e.g. from gallons/second (
GAL/s
) to li-
ters/second (
L/s
)) and the meter will automatically convert the display values to the new unit of measure.
If entering a custom unit (
CUSTM
), a custom conversion factor will need to be entered. See Changing the
) on page 19.